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Prof. Dr. Han Collewijn serving as a subject in the MRFM in the TAP condition
 
 Velcro straps hold a sparker on the top of his head and a orthogonal pair of sensor coils on his forehead. 
 
A mu-metal box, held by a strap around his neck, shields connectors from  sensor coils worn on both eyes. 
 
A ground-wire strap is on his left wrist and the button used to start trials can be seen in his left hand.